Vaping vs Smoking vs IQOS: Which is Least Harmful? YouTube Vaping persists among teens and young adults, despite declines in cigarette smoking. Swipe through for findings from our new report Compared to cigarette smoking, vaping was over three times more likely Young people who vape are 3 times more likely to take up smoking cigarettes. Vaping can lead to lung damage and can be harmful for young brains, which are still developing until Vaping: What Parents Need to Know Vaping isn't harmless it's a serious concern. Most vape products contain nicotine, a highly addictive substance that can impact developing brains and overall health.